Welcome to TFP!

Here is what I am seeing from your description:
1 - How are you testing your water now? Do you have a TF-100 or Taylor K-2006C test kit? That is a priority.
2 - Your cloudy water is most likely the onset of algae. Your FC has been too low for much too long. This is why you can't maintain a good FC level. Also, your SWG will never be able to keep-up with an excessive organic level.
3 - Add some liquid chlorine right away. Try to get the FC up to about 8 ppm.
4 - If you have a proper test kit, I would recommend doing an
Overnight Chlorine Loss Test once you increase the FC to about 8. If you fail, which is likely, then a
SLAM Process would be in order to kill and remove algae.
5 - Take a moment to update your signature with all of your pool and equipment info. It will help later.
If you have any questions please let us know.